Apparatus for regulating lateral movement of longitudinal sieves



April 22, 1930. w, BRECHT ET AL 1,755,202

APPARATUS FOR REGULATING LATERAL MOVEMENT OF LONGITUDINAL SIEVES Filed May 15, 1929 IN VENTOfi-S Patented Apr. 22, 1930 1,755, zcz

[ mural) 5mm mes: omen wanna Bnncn'r AND Enron scnnun, or anesnune. ennmm r arrm'rus non nneumrme LATERAL movnunn'r or nonerrunmnnsrnvns Application-filed Kay 15, 1929, Serial No. 368,377, and in Germany January 28, 1928.

This invention is concerned generically with machines for the manufacture of paper and is more particularly directed to improvements in machines of the class embodying longitudinal sieves.

Theinvention has for its. primary'object the rovision of an improved'apparatus, op-

erab e by the force of a jet of water, by

the lateral shifting movements of the iongitudinal' sieve, the invention in its evolvement havin in view to attain this object without sub ecting the chain wires of the sieve to injurious grinding or rubbing on the covering of the suction casing.

It is well-known that in paper manufacturing machines important advantages result from the use of devices for automatically 'regulating the lateral movement of the 2 straight run' of the sieve cloth; and heretofore for this purpose there has been proposed I a class of automatically operated control devices in which the lateral course of the border of the sieve is-employed as the means for effecting adjustment of a roller which is arranged to control the adjustment of the sieve.

While the older devices are mainly characterized by the fact that laterally adjustable .sieve borders are employed. as the instru- 30 mentalities by which to effect adjustment of guide means or keys in order-to supply the v impulse for the regulation of the sieves, other methods have been developed in which a water jet, employed at the place where the wardly either into a container or upon the intercepting sieve border, according to the over the container. Under the last mentioned methods the water that escapes interception by the sieve border is received by the container which is equipped with an. outlet so arranged and adjusted that a predetermined quantity of. water normally remains in the container and the changes insuch predeter mined quantity of water are made to serve which automatically to regulate and controlsieve border should run, directs water downas the means by which to effect displacement of the control roller.

These devices and methods, effective up to a certain point, fail to attain the desired results in super-regulation because they are not quickly responsive, inasmuch as where a considerable quantity of' water is required in order properly to effect the displacement of the-control roller it takes too long a time to fill and empty the container. Insuper-regula tion a large container is a prerequisite, since with a small container the power developed is insuflicient to overcome theirictional resistance encountered by the combined displacement of the cont'rol roller and the sieve.

In comparison with known devices, the present invention is concerned with the provision of a quick responsive arrangement, its object being to use the kinetic energy of; the water jet for operating a strike plate, mount-1 ed for partial rotation upon a horizontal axis so, as to be depressed when impinged by the downwardly directed jet of water,-and, after each depression to be promptly automatically elevated by a counter-weight, the strike plate being arranged to oscillate vertically between two end positions without loss of time and its oscillating movement being employed as the source of power whereby to operate the controlmember of a hydraulic device having a power piston which is connected with a" moveable bearing'of the control roller. By this arrangement, quick response is obtained and as well power for conducting operation of any desired magnitude. 8

Through the oscillation of the strike plate between two end positions in the manner described, there is obtained a super-regulation whereby the sieve can be caused to move laterally to and fro between two limitations and which, however, can be kept so restricted that an injurious eifect upon the sieve and the paper web thereon will not take place, while the above mentioned advantages including that of preventing the sieve wires from grinding upon the suction casing will be obtained.

Other objects and aspects of our invention will appear hereinaften,

The invention consists in. the rra gem nt 1 and combination or combinations ofparts hereinafter described and more particularly pointed out in the annexed claims.

The invention will be best understood by referring to the accompanying drawing which illustrates in front elevation, more or lessdiagrammatically, one mode and means for applying the principle involved in the invention which will now be more particularly described with reference to said drawwith the art for conveying the paper web toward the pressure rollers 11 and as well to permit lateral back and forth movements of the sieve during the longitudinal move.- ment thereof.

In the present embodiment, there 'isprovided at a distance from the pressure rollers 11, in a plane above that-in which the sieve has movement, a nozzle 12 designed to direct a jet of water 13 vertically downwardly and in a position where it will at one moment strike upon the marginal edge or border of the sieve and then atanother moment will entirel escape engagement by the sieve, accordingly as the sieve is at its lateral terminals of movement. Directly below the nozzle 12 and in a plane below that in which the sieve has movement is arranged a strike plate 14 which is supported at one end of an arm 15 mounted at 16 upon a support 17 for vertical rocking movement thereona Arranged upon the support 17' are two adjustable stops 18 and 19 which determine the two end positions between which the arm 15 can oscillate. Said arm 15 is provided with a suitable weight or counter-balance 20 by which to swing the arm and strike plate'into that position where the former will engage stop 19.

Near the strike plate 14 the arm 15 has pivoted thereto at 21 a rod 22 which is connected at 23 with a valve stem 24 carrying disc valves 25 and 26 within the-cylindrical valve casing 27. Suitable pipes 27 and 28 communicate, respectively,- with the upper and lower portions of the valve casing, said pipes being herein represented as branched from a main pipe 29 which extends from within a water container 30 and in which is incorporated at 31 a suitable rotor or other device whereby to take liquid from the container and force it therefrom into the valve casing. As illustrated in the accompanying drawing the disc valves 25 and 26 are of less distance a art than the ports through which the pipes 2 and 28 open into the valve casing, while there extends from the valve casing two pipes 32 and '33 whose ports are substantially the same distance apart as said disc valves, the pipe 32 bein herein represented as communicating with t e interior of a cylinder 34 at the right hand side of a piston 35 therein while the other pipe 33 communicates with cylinder 34 at the left hand side of said piston 35. With this construction and arrangement, when the water jet impinges uponthe strike plate 14, rod 22 descends caustion of the valve cylinder and through pipe 1 32 to the right hand side of the power piston 35, it being observed in this connection that a return pipe 36, which leads from an intermediate part of the valve casing to the container 30, provides for the completion of the discharge line from the left hand side of the piston through the pipe 33 and the valve 'ing disc valve 26 to close the port for pipe 28 casing. On the other hand, when the jet of water has been intercepted by the sieve, the counter-weight 20 in elevating the strike plate also elevates the connecting rod 22 so as to provide in an obvious manner for the entrance of liquid under pressure to the left hand side of the power piston 35 and for providing a line of exhaust to the container 30 from the chamber at the right hand side of the power piston. In this manner, the impingement of the jet of water upon the strike plate will result in advancing the power piston from the right hand end of the cylinder 34, while when the jet of water has been diverted from the strike plate because of interception by the sieve, the counter-weight will immediately elevate the strike plate with the result that the power piston will be moved from the left hand end of the cylinder 34.

37 designates the control roller by which the sieve is moved to and fro laterally, this control roller being herein represented as having a front movable bearing 38 which is operatively connected with the outer end of the piston rod 39 so that the movement of the power piston from the right hand end of the cylinder 34 will result in moving the front bearing 38 until by the angular displacement of the control roller 37 the sieve 10 will be shifted toward the front, for it is well known that a sieve cloth always runs toward that side where (seen in the running direction) the movable control roller bearing moves toward the end nearest the observer. Through this displacement of the control roller angularly toward the left, the sieve is caused to intercept the jet of water-and divert the same from the strike plate 14. Immediately the jet of water is thus diverted, the strike plate is elevated again because of the influence of the counterweight so that as a result the power piston 35 will move the control roller to the right hand side whereby the sieve will be moved laterally and hence permit the jet of water to impinge again upon the strike plate.

Under this arrangement, the sieve, strike late a manner that will be readily understood. A

valve 42 is herein represented as incorporated in the pipeline 33 for the purpose of effecting an adjustment of the velocity of the I whenthe latter 1s in one lateral power iston 35. e

- It will be apparent from the foregoing that we have produced a simple,practical and elficient apparatus for the automatic regulation of the lateral movement of the longitudinal sieve, andone'which embodies the severalfeatures of advantage enumerated in the statement'of invention and the above descrip tion; and while we have, in the present in stance, shown and described -a preferred embodiment of our invention, it is to be understood that the invention is susceptible of modification in various particulars without departing-from the spirit or scope of our 11) vention or sacrificing any of its advantages.

We claim:- I e 1. In a machine of thecharacter set forth, consisting of a longitudinal web carrying sieve arranged to have lateral shifting from one position to another and a control roller controlling the shifting of the same, a counter-balanced vertically swingable strike plate, means for directing a jet of water upon the strike plate whereby to operate the same,

positioned to insure interception of the jet of water by the sieve when the latter is in one osition of movement, and means controlled y the operation of the strike plate controlling. the operation of the control roller.

2. In a machine of the kind set forth, characterized by having means directing a jet of water downwardly upon a longitudinally traveling web carrying sieve arranged to be shifted laterally intoand out of a position in which it will intercept the 'et of water, a roller arranged to be displace cooperating with the sieve to cause the lateral shifting thereof, a. strike plate disposed to be impinged and actuated by the jet of water when the sieve is shifted from intercepting position, and hydraulic means for controlling the displace- -ment of the roller, arranged to be operated by the actuation of said strike plate.

3. In combination, a longitudinally traveling sieve arranged to be shifted laterally from one position to another, a roller arranged to be displaced cooperating with the sieve to cause lateral shifting thereof, a water jet trained to be intercepted by the border of the sieve when the latter is in one lateral position, a vertically rockable strike plate aligned with said water jet in a plane below that of the sieve to be covered by the sieve when the latter isin intercepting position, and to be im-- pinged and rocked by the water jet when the sieve is shifted out of the covering position, and means for controlling the displacement of the roller arranged to be operated by the rocking inovement of the strike plate.

4. In combination, a longitudinal traveling sieve; arranged to be shifted laterally from one position to another, a roller arsieve to .be covered by the sieve when the latter is in intercepting position, and to'be in 1 pinged and rocked by the water jet when the sieve is shifted out of coverin hydraulic device controlling 51c displacement of the roller, and valve means controlled by the rocking movement of the strike late controlling the flow of pressure liqui for operating the hydraulic device.

5. In combination, a longitudinal travelposition, a"

ing sieve arranged to be shifted laterally to and fro, an angularly movable control roller controlling lateral shifting to and fro of the sieve, a water jet trained to be intercepted b the sieve when the latter is in one lateral position, a depressible strike plate arranged to be covered by the sieve when the latter is in in-- tercepting position and to be impinged and depressed by the water jet when the sieve is shifted out of covering position, means controlled bythe dGPIGSSlOIl' of the strike plate arranged to move the roller in a direction to cause the shifting of the sieve into covering position, and means for repositioning the strike plate after each operation for moving the roller reversely to cause the shifting of the'sieve out of covering position.

6. In ainachine of the character set forth, the combination with a rocking element, of a hydraulic device including a piston, and

valve means controlled by the rocking movements of said element arranged to control the admission, alternately, of pressure fluid to opposite sides of said iston.

In a machine of 't e character set forth, the combination with a rocking element and the form of a water et, for actuating the rocking element, of a hydraulic device including a piston, valve means under the control of the actuation of said rocking element controlling the admission of pressure fluid to the hydraulic device for operating the piston, and means depending for its operation upon the operation of said piston for intercepting the water jet and directing the eifective force thereof from said rocking element.

' means comprising an application of force, in

8. In a machine of the character set forth,

the combination with a rocking element adapted to be depressed, a means comprising an application of force in the form of a water et for depressing therocking element, a means for automatically elevating the rocking element after each depressiolna hydraulic device including a piston, and valve means connected with the rocking element controlling'the admission of pressure fluid to the hydraulic device for operating the piston, said valve means being arranged .to insure the o' eration of said piston alternately forwar s and backwards according to the respectivedepressin and elevating movements of the rocking e ement.

In testimony that we claim the foregoing as our invention, we have signed our names hereto.

WALTER BRECHT. v ERICH SCI-IAUN. 

